Hi, the
device health status should give you a fairly good idea if a device is offline or online. If health status is
OK or
PROBLEM, the device is online.
CRITICAL status will indicate that either your device is unreachable or any
critical device metric is unhealthy (if you are not defining any additional metric by using the linked setting, you can safely assume that critical status means device is unreachable right now).
Regarding customizing notifications, we have recently introduced global configuration so you can customize many keys (default values for Alert Settings, Metric configuration, Chart Configuration, Notifications) at one single place. Right now it is not available on the master branch. You can use this
setting (on the
dev branch) to override the default notifications for any metric.
Regards,
Hardik Jain